Most scans are carried out by specially trained staff called sonographers.
The procedure is carried out in a dimly lit room so the sonographer is able to get good images of your baby. You will then be asked to lower your skirt or trousers to your hips and raise your top to your chest.
It will usually take place at your local hospital ultrasound department.
Most parents look forward to their scan because it gives them the first glimpse of their baby.
The purpose of the dating scan is to: Some abnormalities may also be detected at this scan, such as neural tube defects (spina bifida is a type of neural tube defect).
This depends on whether you have agreed to have the screening and when the scan takes place.
This schedule is flexible, depending on your pregnancy.
If you experience any complications between your scheduled visits, call your doctor immediately.